. The Locomotive . ^W\ foandationWasher Fig. 8. washer to prevent turning of the nut. In many cases, especially those in which the foundation boltsextend for some distance above the top of the foundation, it will beconvenient to have the bolts so installed that they may be removed, Table of Cast Iron Foundation-Washers. Dia ofBolt A B C I) \ / / 1 TL \ . \ E,■ 1 r 61/2 21/2 % 1^ P Wz 9H 2>V2- W 2% / / \ / 1 \ -) 13 41/ 1^4 2>^ / Cored hole -^ 2 i 16 5 2H 1 3ir i 13424 172 THE LOCOMOTIVE, [April,. and for this purpose the foundation should be constructed withpockets to hold
. The Locomotive . ^W\ foandationWasher Fig. 8. washer to prevent turning of the nut. In many cases, especially those in which the foundation boltsextend for some distance above the top of the foundation, it will beconvenient to have the bolts so installed that they may be removed, Table of Cast Iron Foundation-Washers. Dia ofBolt A B C I) \ / / 1 TL \ . \ E,■ 1 r 61/2 21/2 % 1^ P Wz 9H 2>V2- W 2% / / \ / 1 \ -) 13 41/ 1^4 2>^ / Cored hole -^ 2 i 16 5 2H 1 3ir i 13424 172 THE LOCOMOTIVE, [April,. and for this purpose the foundation should be constructed withpockets to hold the lower washer and nut. The details of such aconstruction are shown in Fig. 9. When this plan is followed, thebolt holes may best be formed by boxes which are held in place bycross braces or stays at the top and by the form for the pockets atthe bottom. This construction for thebolt holes is of great advantage whenplacing heavy machinery. There are nobolts to interfere with the moving ofthe machine and it can easily be rolledinto position and the bolts dropped inlater on. When the bolts are not re-movable a great amount of time is oftenlost by the necessity of elevating themachine above them and, furthermore,damage to them may very readily best mixture for making con-crete for foundations is what is knownas the I :2 mixture or, in other part cement, tzvo parts sand, and fourparts crushed stone (all parts by vol-ume. This mixture forms a dense, hardconcrete. When a foundation is very
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